Need help in updating MI 4 LTE

I just bought this phone and i am trying to update this phone to latest firmware which is V6 but i can't. I am unable to install google apps on it. I tried connecting it to MI PC Suite to update but that doesn't even detect my phone. Strange thing is i can transfer data through USB mode but MI PC Suite is unable to detect my phone. I tried it on two different computers and also tried it with different usb cables but still the same problem. It properly installs USB drivers but undetectable for Pc Suite. I tried couple of articles to install google apps but after installation when i open google play store it gives me error of no network connection. Please help me. here is my phone info:-

Model number: MI 4LTE
Android Version: 4.4.4
MIUI Version: MIUI-.1.10_M006
CPU: Quad-core2.5GHz
RAM: 3.00GB
Internal memory: 11.63GB available 16.00 GB total
Baseband version MPSS.DI.3.0-714863d
Kernel version: 3.4.0-g26e4aff-009900-ga93b357
Build number: KTU84P